-7=-8+y

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Solution for -7=-8+y equation: 



-7=-8+y

We move all terms to the left:

-7-(-8+y)=0

We add all the numbers together, and all the variables

-(y-8)-7=0

We get rid of parentheses

-y+8-7=0

We add all the numbers together, and all the variables

-1y+1=0

We move all terms containing y to the left, all other terms to the right

-y=-1

y=-1/-1

y=1

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